中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen

文献类型:期刊论文

作者Guo, F; Fan, WM; Wang, YJ; Li, CW; Li, XY; Zhang, HF
刊名ACTA PETROLOGICA SINICA
出版日期2005-07-01
卷号21期号:4页码:1265-1270
关键词Subducted Continental Crust Mafic Magmatism Lithospheric Mantle Late Mesozoic Northern Dabie Terrane
ISSN号1000-0569
文献子类Article
英文摘要Late Mesozoic mafic rocks (including mafic dikes/lamprophyres, volcanic rocks and ultramafic to mafic intrusions) from the Dabie-Sulu region show arc-like trace element features (high LILE/HFSE and LREE/HFSE ratios) and have highly radiogenic Sr (1(Sr) = 0.7065 similar to 0.7090) and non-radiogenic Nd (epsilon(Nd) (t) = - 19 similar to -10) isotopic compositions. Most of the mafic rocks have superchondritic Nb/Ta and Zr/Hf ratios, probably as a consequence of relatively CO2- and rutile- rich melt metasomatism in response to the detachment/breakoff of the Yangtze subducted continental slab. The enriched Sr-Nd isotopic signatures in these mafic rocks suggest that the metasomatic melts were probably derived from the subducted continental crust as evidenced by the high-pressure to ultrahigh-pressure metamorphic assemblage in the orogen. The geochemical and isotopic features of the mafic rocks from the Dabie-Sulu region indicate that interaction between melts derived from the subducted continental slab and the overlying mantle is an important mechanism for LILE and LREE enrichment of the lithospheric mantle beneath the orogen.
WOS关键词PRESSURE METAMORPHIC TERRANE ; EASTERN CHINA ; NORTH CHINA ; ISOTOPIC COMPOSITIONS ; TECTONIC IMPLICATIONS ; CONTINENTAL-CRUST ; TRACE-ELEMENT ; ND ; BELT ; SYSTEMATICS
WOS研究方向Geology
语种英语
WOS记录号WOS:000232291300023
出版者SCIENCE PRESS
源URL[http://ir.iggcas.ac.cn/handle/132A11/65224]  
专题中国科学院地质与地球物理研究所
通讯作者Guo, F
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714
Guo, F,Fan, WM,Wang, YJ,et al. Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen[J]. ACTA PETROLOGICA SINICA,2005,21(4):1265-1270.
APA Guo, F,Fan, WM,Wang, YJ,Li, CW,Li, XY,&Zhang, HF.(2005).Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen.ACTA PETROLOGICA SINICA,21(4),1265-1270.
MLA Guo, F,et al."Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen".ACTA PETROLOGICA SINICA 21.4(2005):1265-1270.

入库方式: OAI收割

来源:地质与地球物理研究所

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